Manas Journal of Natural Sciences 1694-5107 Kyrgyz-Turkish Manas University Reduction Of Some Dithiophosphonates In Aprotic Media On Freshly Copper Plated Glassy Carbon Electrode Çekirdek P. Ankara University, Faculty of Science, Chem. Dep., Ankara, Turkey Solak A.o. Ankara University, Faculty of Science, Chem. Dep., Ankara, Turkey Kyrgyzstan-Turkey Manas University, Faculty of Science, Bishkek, Kyrgyzstan Aydin A. Süleyman Demirel University, Faculty of Arts and Science, Chem. Dep., Isparta, Turkey Yilmaz H. Ankara University, Faculty of Science, Chem. Dep., Ankara, Turkey 01 01 2011 2 12 1 16 Copyright © 2001, Manas Journal of Natural Sciences 2001 Manas Journal of Natural Sciences

Dithiophosphonates are reduced electrochemically with two electron transfer in acetonitrile containing 0.1 M tetrabutylammonium tetrafluoroborate TBATFB at a freshly copper plated GC electrode. The peaks for all of the dithiophosphonate derivatives were observed at about –1.5 V vs. Ag/Ag+ at copper plated GC electrode. Data revealed that the reduction process on copper electrode was irreversible and followed by EC mechanism. The diffusion coefficients and numbers of electrons transferred were found by UME electrode using Baranski method. The adsorption tests were applied to examine the adsorption characteristics of the derivatives under investigation. Simulation CV voltammograms of dithiophosphonates were acquired by DigiSim® 3.03 version and compared with the experimental voltammograms to calculate the chemical and electrochemical constants

 Dithiophosphonates electrochemical reduction cyclic voltammetry digital simulation chronoamperometry adsorption ultramicro electrode Howarth N.M., Cooper G., Duncan A., Reed M.J., Potter B.V.L., Bioorganic and Medicinal Chemistry Letters. 3(2) (1993) 313-318. Cohen B.E., Egorin M.J., Nayar M.S.B., Gutierrez P.L. Cancer Res. 44 (1984) 4312 Mckenna C.E., Li Z.-M., Ju J.–Y., Pham P.-T.T., Kilkuskie R., Loo T.L., Straw J. Phosphorous, Sulfur and Silicon, 74; 469-470. Livingstone E., Mikhelson A.E. Inorg. Chem. 9 (1970) 2545. Shopov D., Yordanov N.D. Inorg. Chem. 9 (1970) 1943. Patnaik P.A. Van Nostrand Reinhold: New York 1992 Chapter 40. Chavdarian C.G. Stauffer Chemicals Co. U.S. Patent 4 (1987) 683, 225. Klaman D. Verlac Chemie Weinheim, Germany, 1984. (b) Colclough T.T. Ind. Eng. Chem. Res. 26 (1987) 1988. (c) Dumdum J.M., Mendelson L.T., Pilling R.L. Chem. Abstr. 112 (1990) 201925. Zyl W.E.V., Fackler W.E., Jr J.P. Phosphorous, Sulfur and Silicon167 (2000) 117. Haiduc I., David L., Cozar O., Mezei G., Armenean M. J of Molecular Structure. 482 (1999) 153-157 Marin D., Valera R., de la Red E., Teijero C. Bioelectrochemistry and Bioenergetics 44 (1997) 51-56. Schischkov A., Dentschev S., Malakova C. Talanta, 31 (1) (1984) 69-72 Nikitin E.V., Zagumennov V.A., Romakhin A.S., Kosachev I.P., Babkin Y.A. Electrochimica acta 44 (13) (1997) 2205 Balankespoor R. Inorg. Chem. 24 (1985) 1126-1128. Cheng H.L., Kuei C.H., Sun I.W. Electroanalysis 14 (2002) 767. Nabaoui H., Mugnier Y., Fakhr A., Laviron E., Mofidi J., Antinolo A., Jalon F.A., Fajardo M., Otera A. Journal of Organometallic Chenistry. 362 (1989) C8-C10. Zeng Y., Zhou S. Electrochemistry Communications 1 (1999) 217-222. Vagina G.A., Balueva A.S., Troepolskaya T.V., Erastov O.A. Izv. Akad. Nauk SSSR, Ser. Khim. 1 (1991) 182-185. Mueller E., Emons H., Lipkowski J., Doerfler H.D. J. Electroanal. Chem. Interfacial Electrochem 160 (1-2) (1984)261-269. Hicyilmaz C., Altun N.E., Ekmekçi Z., Gokagac G. Minerals Engineering. Dürr. (2004). Baranski A.S., Fawcett W.R., Gilbert C.M. Am. Chem. Soc., 57, 1 (1985) 166. Cekirdek P., Solak A.O., Karakus M., Aydin A., Yilmaz H. Electroanalysis 18(23), (2006) 2314. Bard A.J., Faulkner L.R. Electrochemical Methods Fundamentals and Applications, 2nd ed., Wiley, New York, 2001. Wopschall R.H., Shain I. Anal. Chem. 39 (1967) 1535-1542. Wopschall R.H., Shain I. Anal. Chem. 39 (1967) 1514-1527. Greef R., Peat R., Peter L.M., Pletcher D., Robinson J., Instrumental Methods in Electrochemistry. 1990.